Gate



L. A. WIELAND Oct. 13 1925- are 51105 July 16, 192.3

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Patented Uct. 13, 1925.

LOUIS A. WIELAND, OF IITTSEURGH, FENNSYLVANIA.

GATE.

Application filed; July 16, 1923.

1' 0 all whom it may concern:

Be it known that 1, Lotus A. Wisteria, a citizen of the United States, and resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Gates; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to expansible gates for use in elevators, in door-ways and "for other purposes, and it has special reference to the type of gate which consists of upright bars connected by diagonal lattice bars which are attached to the uprights in such a way that the uprights remain parallel when the gate is expanded and compressed.

One object of my invention is to provide an improved gate of the character indicated, which in its closed position shall occupy less space than ordinary gates of the same ty e.

inother object of my invention is to provide a gate of the character indicated having means for attaching the lattice bars to the upright bars in such a way that they cannot become detached from the uprights through accident or careless handling.

A further object of my invention is to provide a gate of the character indicated having improved rigidity as compared with ordinary gates of the same type, the greater rigidity being obtained by a special arrangement of the lattice bars and their connection to the uprights.

In the accompanying drawing, Fig. 1 is a side elevational view of a portion of a gate constructed in accordance with my invention, the gate being shown in its expanded position; Fig. 2 is a side elevational view of the same parts in their closed position; Fig. 3 is a horizontal sectional view on the line 3-3, Fig. 1, showing the manner in which the lattice bars are connected to the uprights; and Fig. 4 is an enlarged fragmenta-ry side elevational view of one of the joints between the lattice bars and the uprights.

In the drawing the numerals 2 indicate a plurality of parallel upright bars each of which has a longitudinal slot 3 formed in one side, and communicating with aspace 4 within the upright. The uprights 2 may be made in any desired cross-section, the only requirement being that an undercut 'slot be provided having an enlarged area within the upright.

Serial No. 651,873.

The upright bars 2 are joined by means of lattice bars 5 which are pivotally connected at their inner ends by means oi rivets 6 and are arranged in two adjacent sets of crossed lattice bars, forming a total thickness oi tour bars when the gate is viewed from above as in Fig. 3.

The upright bars 2 are alternatively con nected to opposite sides of the lattice bars approximately one-half as compared with gates of ordinary construction in which all of the upright bars are on one side of the lattice bars, or in which the upright bars are arranged opposite to each other on both sides of the lattice bars.

As best shown in Figs. 3 and 4, each of the sliding rivets 6 which connects the lattice bars to the upright bars extends within the cavity 4: of its upright bar and carries a rectangular lug 7 which is wider than the slot 3. The lugs 7 insure that the rivets 6 cannot be removed laterally through the slots 3, and they also increase the rigidity of the gate'because any attempt to distort the gate will be resisted by the lugs 7.

The gate constructed in the manner described above is very rigid, both edgewise and laterally. That is to say, the gate will not sag when it is supported from one edge, and it will not bend it an attempt is made to fold it sidewise when it is open. This rigidity is produced by the two superposed sets of lattice bars, and also by the rectangular lugs 7.

While I have shown in the accompanying drawing a preferred embodiment of my in vention, it will be understood that various changes in theconstruction and arrange ment of parts may be made without departin from the scope of my invention as set forth in the appended claims.

I claim as my invention:

1. An expansible gate comprising two sets of lattice bars, each provided at its outer side with picket bars, and means for connecting said lattice bars in side by side relation to term a unitary structure, the sets of lattice bars being assembled in longitndinally oil-set relation so ti at when expanded the picket bars at one side of the structure will be oil-set horizontally with respect to the picket bars at the other side thereof.

2. An enpansible gate comprising two sets of pivotally connected lattice bars arranged adjacent to each other and forming a cornbined thickness of four of said lattice bars, a plurality of parallel bars connected alternately to opposite sides oi' said lattice bars, and means for securing each. of said parallel bars to the adjacent set 0% lattice bars comprising a rivet extending through two ct said lattice bars and into an undercut slot formed in said parallel bar, and a member carried by said rivet and received in the enlarged interior portions of said slot.

3. An expansible gate comprising two adjacent sets of lattice bars, each of said sets being composed of lattice bars pivotally connected at their ends, aplurality of parallel bars connected alternately to opposite sides of said lattice bars, the parallel bars on one side being connected to one set of said lattice bars and the parallel bars on the other side being connected to the other set of lattice bars, and means for securing each of said parallel bars slida-bly to said lattice bars comprising a rivet extending through the joined ends or a pair of said lattice bars and also extending into an undercut slot formed in said parallel bar, and a rectangular ineinber carried by said rivet and received in the undercut portion of said slot.

In testimony whereof I the said Louis A. \VIELANI), have hereunto set my hand.

LOUIS A. VIELAND. 

